Hi, I tried to solve these by way of the reduced row echelon, and posted my answers. If anyone could check em', I'd appreciate it.

x+ y + 2z = -1

x- 2y + z = -5

3x+ y+ z = 3

(For this one, I got x= 1, y=2, z= -2)

Anyone agree/disagree?

===================

Next,

x+y+z=0

x+z=0

2x+y-2z=o

x+5y+5z=0

looks to me like x=y=z=0? But when I reduced the rows, it was showing that 1=0, so could the answer be no solution?

Thanks a lot